A ladder 8.5m long is placed with its foot at a distance of 4m from the wall of a house and just reaches a window will . find the height of a window will and the sine and tan of the angle which the ladder makes with the wall

Answer 1

just good-old Pythagoras here.

y^2 + 4^2 = 8.5^2
...
y = √56.25

sinØ = √56.25/8.5 = ..

tanØ = √56.25/4 = ...